Corsair FRAME 4000X RS: CC-9011302-WW · black · standard RS120 fans
Lian Li A3-mATX: A3-mATX steel case in black or white (A3-mATX BLACK / WHITE). The Wood Edition with a wooden front (A3-mATX-WD) and the Glass Edition with 3 mm tempered glass (A3-mATX-WDG) share the interior layout but differ in materials and dust filter arrangement; the later B4-mATX is a separate case.
| Specification | Corsair FRAME 4000X RS | Lian Li A3-mATX |
|---|---|---|
| Release year | 2026 | 2024 |
| Announcement and availability | 7 April 2026; immediately available at announcement Corsair | — |
| Case type | Mid-tower; steel, tempered glass, plastic Corsair | — |
| Motherboard support | Mini-ITX, Micro-ATX, ATX; E-ATX up to 305 × 277 mm Corsair | — |
| Back-connect motherboard support | Supported Corsair | — |
| Graphics card clearance | 405 mm with 25 mm front fans; nominal 430 mm without front fans Corsair | — |
| CPU cooler height | Up to 170 mm Corsair | — |
| Power supply | ATX; up to 220 mm long Corsair | ATX / SFX / SFX-L up to 220 mm; side or front mounting Lian Li |
| Included fans | 4 × RS120 PWM; unlit Corsair | — |
| Front panel | RGB Flow; 64 LEDs; 5 V ARGB Corsair | — |
| Front I/O | 20 Gbit/s USB-C; 2 × 5 Gbit/s USB-A; combined headphone/microphone Corsair | Power button, 2 × USB 3.0 Type-A, 1 × USB 3.1 Type-C, mic, HD audio Lian Li |
| Controls | Power button; no reset switch or drive activity LED Corsair | — |
| Front/top fan rails | Front fans up to 200 mm; top fans up to 140 mm Corsair | — |
| Radiator mounts | Front/top/side: 240, 280 or 360 mm; rear: 120 or 140 mm Corsair | — |
| SATA drive bracket | 2 × 2.5-inch SSDs or 1 × 3.5-inch HDD Corsair | — |
| Cable clearance | 37 mm behind the motherboard Corsair | — |
| Dust filters | Front, side and bottom Corsair | — |
| Vertical GPU mounting | Rotatable PCIe bracket; riser cable separate Corsair | — |
| iCUE LINK lighting | Separate RGB adapter, compatible LINK hub and iCUE 5 required Corsair | — |
| Case type and volume | — | MFF (Micro Form Factor); 26.3 L Lian Li |
| Dimensions | — | 443 × 194 × 321.5 mm (D × W × H); 306 mm tall without feet Lian Li |
| Material | — | Steel; side and top panels in steel mesh Lian Li |
| Motherboard | — | M-ATX and ITX; 4 expansion slots Lian Li |
| Graphics card | — | Up to 415 mm long, 4 slots thick Lian Li |
| CPU cooler | — | Up to 165 mm tall Lian Li |
| Fan support | — | Top: 3 × 120 mm; side: 3 × 120 mm or 2 × 140 mm; bottom: 3 × 120 mm; rear: 1 × 120 mm Lian Li |
| Radiator support | — | Top: 360/240 mm; side: 360/280/240 mm; bottom: 240 mm (360 mm with fan at the bottom) Lian Li |
| Drive support | — | Tray: 2 × 2.5" SSD; bottom: 1 × 2.5" SSD or 1 × 3.5" HDD Lian Li |
| Dust filter and warranty | — | Removable bottom dust filter; 1-year warranty Lian Li |